Two-way plow



Jan. 15, 1952 s. KALTOFT 2,582,337

TWO-WAY PLOW Filed May 16, 1950 s Sheets-Sheet 1 INVENTOR. 6/01/20 flz 70;)

S. KALTOFT Jan. 15, 1952 TWO-WAY PLOW 5 Sheets-Sheet 2 Filed May 16, 1950 w m N w mm f wk 4% w no.

S. KALTOFT Jan. 15, 1952 TWO-WAY PLOW 3 Sheets-Sheet 5 Filed May 16, 1950 fj'y- Ft/RROW ll/VE d GROUND l/N GROUND Z/A/E INVENTOR By @6020 Kata/ 7- flztorne y GROUND .U/VE

Patented Jan. 15, 1952 UNITED STATES @ATENT OFFICE TVVO-WAY PLOW Application May 16, 1950, Serial No. 162,245

4 Claims.

This invention relates to a two-way plow.

Objects of the invention are: to provide a plow having several bottoms, some of which are vertically reversed relative to the others and wherein the bottoms can be reversed in order that successive sets of furrows of the same hand can be made across a field and wherein the reversing mechanism can be easily controlled through suitable fluid pressure means; to provide a reversible two-way plow including a wheel supported frame and wherein a wheel or wheels can be moved to raise and lower the frame relative to the plow bottoms; to provide synchronized power means for producing relative movement of the wheels and plow bottoms to facilitate reversal of. the plows; and to provide power actuated locking means for securing the plow and wheel or wheels in predetermined relative positions and synchronously releasing them during the reversing operation.

The above and other objects and advantages will more fully appear from the following description in connection with the accompanying drawing wherein:

Fig. 1 is a side elevational view of an embodiment of the invention.

Fig. 2 is a plan view with certain of the up wardly disposed and inverted plowshares re moved.

Fig. 3 is an enlarged perspective detail of the plowshare tilting and locking mechanism. v

Fig. 4 is an enlarged fragmentary sectional detail taken approximately on the line IVIV of Fig. 3.

Fig. 5 is an enlarged exploded perspective oia portion of a plow locking means with certain parts in full and broken lines in their separated and assembled positions.

Figs. 6 through 11 are somewhat diagrammatic side elevational views showing a ground wheel and a plow tilting lever in different relative positions and illustrating the manner of reversal of the device.

The plow has a horizontal longitudinal main I frame 52 with a downwardly stepped drawhar portion M. The frame It has oppositely extending wings It in outwardly converging pairs joined at their outer ends by hearing units is and end plates 26. Bearing units 22 extend between the inner ends of each pair of wings it. One pair of bearing units i8 and 22 supports an axle section 2i and the other pair of bearing units I8 and 22 supports an axle section 26. Each axle section has an angular portion 28 and 3t and each angular portion supports a stub axle section 32 and 34. Ground wheels 36 and 38 are rotatably mounted on the axle sections 32 and 34. Swinging movement of each ground wheel about the axis of its axle section 2 3 or 2t is limited by adjustable stops 40 which are mounted in spaced relation on the end plates 20 and are adapted to be engaged alternately by arms 42 and M on axle sections 24 and 26, respectively.

Adjacent the rear or right hand end of the mainframe l 2 is a left hand plow assembly supporting shaft 46. Mounted upon and rotatable about the shaft 45 is a plowshare bracket plate 48 which, in Figs. 1 and 2, is provided with a pair of downwardly extending sockets 5G in which are removably received vertical posts 52 which support plowshares 54 on their lower ends. Extending upwardly from the plate 48 is a socket 55 having a plowshare post 58 received therein to support an inverted plowshare 6D.

The main frame l2 has a second plowshare assembly supporting shaft 62 extending from its side opposite to the shaft 46, both shafts being directed diagonally rearwardly. A plowshare unit supporting plate 64 is pivotally carried by the shaft 62. In the position of Figs. 1 and 2, the plate 64 has a single socket 66 extending downwardly therefrom. In this socket is a plowshare post fill to which is secured a plowshare Ill. EX- tending upwardly from the plate 64 are sockets E2 in which are plowshare supporting posts '14. Each of the posts 74 supports a plowshare 16.

Only one of the plowshares 16 is illustrated in Fig. 1, and neither of these shares is shown in Fig. 2. However, it should be understood that the two shares 16 in the position of Figs. 1 and 2 are inverted as is the plowshare on the left hand unit.

Rotatably mounted on the inner end of the plowshare assembly supporting shaft 45 is an arcuate cam 18. The cam is secured to a cam lever Bil which is provided with a collar 82 rotatable about the inner end of the shaft 46. The cam '58 has edges 3% and 86 which are adapted to bear alternately against portions of the plate 48 at opposite sides of said shaft 46.

The cam lever Bil includes a disk-like portion 88 having a cam notch 99 therein.

Slidably supported in sleeves 92 and 94 on the frame I2 is a longitudinally disposed cam link 96 which lies in the same plane as the cam disk 88. Mounted on the inner end of the wheel axle sec tion 26 is a cam plate S8 having a high arcuate portion Hil a low arcuate portion I02 and an intermediate abutment portion I04. The cam plate 98 isfixed on the axle section 26 to rotate 3 therewith and it is in the same plane as the forward end of the cam link 86.

The right hand side of the apparatus is provided with cams, cam plates, cam levers and cam links in the same manner as the left hand side just described. These elements are best indicated in Figs. '1, 9 and 11. These figures show a cam disk I06 having a notch I08 and a cam lever I I0. The cam disk I06 has an arcuate cam member II2 extending therefrom. A cam link H4 is mounted for sliding movement longitudinally of the frame I2, similarly to the link 96 described above. On the inner end of the wheel axle section 24 is a cam plate H6 having a high portion H8, a lower portion I20 and an intermediate abutment I22.

The rear cam plate I86 has a catch abutment I24 thereon and the other rear cam plate 88 in the left hand assembly has a similar abutment I28, as shown in Figs. 6, 8 and 10.

Intermediate the ends of the frame I2 and slightly above the frame are fluid cylinders I28 and 30. The cylinder I28 is pivotally connected at I32 to a crank arm I34 which is rigidly secured to the wheel axle section 26. The cylinder I30 is pivotally connected at I36 to a crank arm I38 on the wheel axle section 24.

Piston rods I40 and I42 extend from their respective cylinders I28 and I30 and are pivotally connected to the cam levers 80 andv I I0, respectively.

The plow unit supporting plate 48 has an inward extension I44 and the plate 64 at the opposite side of the frame is provided with an inward extension I46. In Fig. 3, the right hand plate extension I46 is shown resting upon a pair of bumpers I48 on a plate I50 at the rear end of the frame I2. The frame is shown in Fig. 3 to be cut away vertically at the point where the plate I50 is attached. On the rear top portion of the frame I2 is a block 552 through which a pair of latching bolts E54 and I56 are slidable. The bolt I54 is connected at I58 to the right hand cam link I44 to be moved thereby. The bolt I56 is connected at I60 to the cam link 66 to be moved thereby.

Referring to Figs. 4 and 5, the frame I2 is shown with a sleeve I62 passing therethrough to rotatably support an inner sleeve I64 approximately beneath the block I52 through which the latching bolts i54 are slidable. Connected to the right hand end of the sleeve I64 is a hook I66. Extending from the other end of the sleeve I64 is a crank arm I68. A stub shaft I10 is rotatably supported in the sleeve I84. One end of this shaft has a hook I12 welded thereto and the other end of the shaft is provided with a crank arm I 14.

As viewed in Figs. 3 and 4, the inward extension I44 of the plow unit supporting plate 48 lies beneath the frame I2 and is held by the hook I66. (The arrangements in Figs. 4 and are viewed from the opposite direction as distinguished from their relationships in Fig. 3.)

The fluid cylinders I28 and I30 are shown with fluid pressure inlet connections I16 and I18. Through suitable control valve mechanism not shown, fluid under pressure is adapted to be admitted to either end of each of the cylinders I28 and I30.

The vertical broken lines in Figs. 6, 8 and represent the plowshare supporting posts 52 and 58 on the left hand plow assembly, as viewed in Figs. 1 and 2. The vertical broken lines in Figs. 7, 9 and 11 represent the plowshare supporting posts 68 and 14 which form part of the right hand assembly. The position of the plow in Figs. 1 and 2 is diagrammatically illustrated in Figs. 6 and 7, Fig. 6 illustrating the left hand portion and Fig. '7 illustrating the right hand portion. The left hand ground wheel 38 is lower than the wheel 36, said wheel 38 functioning as a furrow wheel in that position. Wheel 36 in its elevated position of Fig. '1 is functioning as a ground wheel.

When the plows are to be reversed, fluid pressure is admitted to piston 28 through the conduit I16. The furrow wheel 38 will swing more freely than the plow section on the same side on the frame I2. The furrow wheel 33 will swing from the position of Fig. 6 to the position of Fig. 8. At this point the abutment I84 on the cam plate 68 will engage the end of the cam link 96 and prevent further rearward swinging movement of the wheel. 38. In the position of Fig. 8 the plowshares 54 which are the downwardly disposed plowshares on the left hand unit, will be at least partially freed from the ground. Continued application of pressure to the left hand end of the cylinder iii! will cause the cam lever on the cam plate 88 to swing in a clockwise direction. This is due to the fact that the ground wheel 38 is held against further rearward swinging, thereby holding cylinder I28 and permitting the piston rod I46 to move rearwardly and out of said cylinder $23.

As the cam plate 88 rotates in a clockwise direction, the arcuate cam 13 will bear against the left hand plow unit supporting plate 40 and swing the left hand plow assembly to a vertically reversed position, as indicated in Fig. 10. The arcuate cam 18 swings the left hand low unit about the shaft 46 until the center of gravity of the plow unit has passed a line extending vertically upwardly from said shaft I46. Thereafter the weight of the plow unit will complete the reversal of movement from the position of Figs. 6 and 8 to that of Fig. 10.

When the left hand plow unit is reversed and in the position of Fig. 10, the abutment m4 will force the cam link 96 rearwardly, provision for such movement having been made by the movement of the cam notch 66 to a point which will permit limited rearward movement of the cam link 96. Thereupon the wheel can swing further rearwardly or in a counterclockwise direction to a position equivalent to the position of wheel 36 in Fig. 1.

As stated above, when the left hand unit is in the position of Fig. 6. the right hand unit is in the position of Fig. 1. As fluid under pressure is admitted to the left hand end of cylinder 128, fluid is admitted to the right hand end of cylinder I30. The cam plate I66 is locked because the cam link 4 I4 is lodged in the cam notch I88. Consequently, the cylinder I36 will move to the right or rearwardly and swing the wheel 36 in a clockwise direction or toward the forward end of the machine. This is illustrated in Fig. 9. When the intermediate abutment 522 passes the forward or left hand end of the cam link I I4", the piston rod I42 will move forwardly. This occurs because there is less resistance to the movement of the piston rod i i-.2 than there is created by the resistance offered by the ground wheel 36. The piston rod I42 is permitted to move since the cam notch @138 will shift the cam link II4 to the left or forwardly. The piston rod I42 will continue to move forwardly and rotate the cam lever H8 and cam plate !86 in a counterclockwise direction and cause the right hand plow assembly to be vertically reversed, as indicated by the reversed positions of the vertical broken lines 68 and 74 in Figs. 9 and 11.

It may be apparent, but it is thought best to call attention to the fact that the pairs Figs. 6 and 7, 8 and 9, and and ll represent, respectively, the positions of the left and right hand plow assemblies and wheel units as the plow is reversed.

When the device is in the position of Fig. 3, also shown in Figs. 6 and 7, the first movement is of the wheel 36. The mechanism of 6 cannot move first since it is held by the catch I12 shown also in Fig. 3. The cam plate Hit of Figs. 3 and 7 cannot initially move because it is held by the cam link lid in the cam notch Hit. The wheel 36 initially swings from the position of Fig. '7 to that of Fig. 9. In the latter position the cam plate I It on the wheel axle section 2 3 will release the cam link il l, permitting the cam plate I66 to move in a counterclockwise direction and shift the cam link il to the left. This withdraws the latch bar its from its position in Figs. 3, 7 and 9 where overlies: the lateral extension Hit on the plow unit sup porting plate B l. 4

As the cam plate Hi5 rotates, after the latch bar E54 is released, the abutment 25 on said cam plate 186 will strike the crank arm I68 and release the catch hook i565. This frees the lateral extension M4 on the plow unit supporting plate 48. Then the cam plate 88 can move in a clockwise direction. When the plows are reversed the release of the latch bar I56 and catch hook I12 are accomplished in a similar manner.

The device disclosed herein provides for efficient reversal of the plow units with a simple manual control. This control is not shown but, as stated above, is a simple reversing valve to cause a flow of fluid under pressure to either end of the cylinders I28 and I30.

It is possible to place the apparatus in a nonplowing or carrying position by halting the application of fluid pressure when one side of the unit has been reversed and before reversal of the other side has been completed. This will leave both wheels 36 and 38 in the positions of Figs. 8 through 11 and the plowshare units will be maintained out of contact with the ground.

The device is sturdy in structure and actually more simple in operation than is indicated by the disclosure in the drawings. It permits the operator to turn the machine around on the ground at the end of a furrow and start back with a new series of furrows immediately adjacent the preceding furrows with the furrows thrown in the same direction.

It will be understood that various changes can be made in the form and details of the device without departing from the spirit of the invention.

I claim:

1. In a plow, a frame supporting ground wheel having a support in the form of a frame connection swingable longitudinally of the frame in an arc to raise and lower the frame, a plowshare support swingable on said frame and relative to said wheel support, a pair of movable power devices having a common power source connection,

one of said power devices being connected to said ground wheel frame connection to swing the same, the other power device being connected to said plowshare support to swing the same, a control device having portions movable into looking positions relative to said wheel support and plowshare support in response to the relative positions of said supports.

2. In a plow, a frame, a pair of ground wheels independently and movably connected to said frame to raise and lower the same, a pair of plowshare supports connected to said frame and swingable to vertically reversed positions relative to the frame, a fluid pressure piston and cylinder unit including piston and cylinder parts, one of said parts being connected to one of said ground wheels, the other of said parts being connected to one of said plowshare supports, a second cylinder and piston unit similarly connected to the other ground wheel and the other plowshare support, a common source of fluid pressure having reverse flow connections with each of said cylinders at both sides of each of said pistons, and a control assembly connected between each wheel and plowshare support to control movement of the wheel relative to the plowshare support and vice versa, one of said cylinder and piston parts being operative to move its connected ground wheel or plowshare support, depending upon the position of said control unit relative to the ground wheel and plowshare support.

3. The structure in claim 2, and a plowshare support locking assembly on said frame and having portions respectively connected to a part of each cylinder and piston unit, said looking assembly being operable to look its respective plowshare support in one position of the support and to release said support preparatory to movement thereof.

4. In a plow, a frame, a ground wheel unit connected to said frame for swinging movement in an arc longitudinally of the frame to raise and lower the same, a plowshare support mounted on said frame for swinging movement in a plane generally longitudinally of said frame, a link between said wheel unit and said plowshare support and shiftable toward and away from the.

wheel unit and plowshare support, abutment structure on said wheel unit and on said plowshare support for engaging said link when the link is moved toward either said wheel unit or plowshare support, and additional structure on said wheel unit and plowshare support for moving said link out of the path of either abutment.

SIGURD KALTOFT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 118,694 Coreth Sept. 5, 1871 2,079,595 Collins May 11, 1937 2,153,824 Collins Apr. 11, 1939 2,552,097 Kaltoft May 8, 1951 

